<template>
    <form
        id="data-form-container"
        ref="form"
        @submit.prevent="handleSubmit"
        class="data-form-container"
    >
        <div class="form-item">
            <div class="input-area">
                <input
                    type="text"
                    maxlength="10"
                    v-model="formData.nickname"
                    placeholder="用户昵称"
                />
                <span class="tip">{{ formData.nickname.length }}/10</span>
            </div>
            <div class="error">{{ error.nickname }}</div>
        </div>
        <div class="form-item">
            <div class="text-area">
        <textarea
            maxlength="300"
            placeholder="输入内容"
            v-model="formData.content"
        ></textarea>
                <span class="tip">{{ formData.content.length }}/300</span>
            </div>
            <div class="error">{{ error.content }}</div>
        </div>
        <div class="form-item">
            <div class="button-area">
                <button :disabled="isSubmiting">
                    {{ isSubmiting ? "提交中..." : "提交" }}
                </button>
            </div>
        </div>
    </form>
</template>

<script>
export default {
    data() {
        return {
            formData: {
                nickname: "",
                content: "",
            },
            error: {
                nickname: "",
                content: "",
            },
            isSubmiting: false,
        };
    },
    methods: {
        handleSubmit() {
            this.error.nickname = this.formData.nickname ? "" : "请填写昵称";
            this.error.content = this.formData.content ? "" : "请填写内容";
            if (this.error.nickname || this.error.content) {
                // 有错误
                return;
            }
            this.isSubmiting = true; // 正在提交，防止重复点击
            this.$emit("submit", this.formData, (successMsg) => {
                this.$showMessage({
                    content: successMsg,
                    type: "success",
                    duration: 1000,
                    container: this.$refs.form,
                    callback: () => {
                        this.isSubmiting = false;
                        this.formData.nickname = "";
                        this.formData.content = "";
                    },
                });
            }); // 让父组件来处理事件
        },
    },
};
</script>

<style scoped lang="less">
@import "~@/styles/var.less";

.data-form-container {
    margin-bottom: 20px;
    overflow: hidden;
}

.form-item {
    margin-bottom: 8px;
}

.input-area {
    width: 50%;
    position: relative;
}

.text-area {
    position: relative;
}

.tip {
    position: absolute;
    right: 5px;
    bottom: 5px;
    color: #b4b8bc;
    font-size: 12px;
}

input,
textarea {
    display: block;
    width: 100%;
    box-sizing: border-box;
    border: 1px dashed @gray;
    outline: none;
    color: @words;
    font-size: 14px;
    border-radius: 4px;

    &:focus {
        border-color: @primary;
    }
}

input {
    padding: 0 15px;
    height: 40px;
}

textarea {
    resize: none;
    padding: 8px 15px;
    height: 120px;
}

.error {
    margin-top: 6px;
    color: @danger;
    font-size: 14px;
    height: 20px;
    line-height: 20px;
}

button {
    position: relative;
    cursor: pointer;
    border: none;
    outline: none;
    width: 100px;
    height: 34px;
    color: #fff;
    border-radius: 4px;
    background: @primary;

    &:hover {
        background: darken(@primary, 10%);
    }

    &:disabled {
        background: lighten(@primary, 20%);
        cursor: not-allowed;
    }
}
</style>
